This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 1 | 7 |
| 2 | 1791 |
| 3 | 64257 |
| 4 | 1950000 |
| 5 | 60459696 |
| 6 | 1977314738 |
| 7 | 68719456256 |
| 8 | 2541865795524 |
| 9 | 99999999950000 |
| 10 | 4177248169342446 |
| 11 | 184884258894932736 |
| 12 | 8650415919381195128 |
| 13 | 426878854210636550576 |
| 14 | 22168378200531005606250 |
| 15 | 1208925819614629174378496 |